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- /* LIBGIMP - The GIMP Library
- * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
- *
- * gimpmatrix.h
- * Copyright (C) 1998 Jay Cox <jaycox@earthlink.net>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
- #ifndef __GIMP_MATRIX_H__
- #define __GIMP_MATRIX_H__
-
- #ifdef __cplusplus
- extern "C" {
- #endif /* __cplusplus */
-
-
- typedef gdouble GimpMatrix3[3][3];
- typedef gdouble GimpMatrix4[4][4];
-
- void gimp_matrix3_transform_point (GimpMatrix3 matrix,
- gdouble x,
- gdouble y,
- gdouble *newx,
- gdouble *newy);
- void gimp_matrix3_mult (GimpMatrix3 matrix1,
- GimpMatrix3 matrix2);
- void gimp_matrix3_identity (GimpMatrix3 matrix);
- void gimp_matrix3_translate (GimpMatrix3 matrix,
- gdouble x,
- gdouble y);
- void gimp_matrix3_scale (GimpMatrix3 matrix,
- gdouble x,
- gdouble y);
- void gimp_matrix3_rotate (GimpMatrix3 matrix,
- gdouble theta);
- void gimp_matrix3_xshear (GimpMatrix3 matrix,
- gdouble amount);
- void gimp_matrix3_yshear (GimpMatrix3 matrix,
- gdouble amount);
- gdouble gimp_matrix3_determinant (GimpMatrix3 matrix);
- void gimp_matrix3_invert (GimpMatrix3 matrix,
- GimpMatrix3 matrix_inv);
- void gimp_matrix3_duplicate (GimpMatrix3 src,
- GimpMatrix3 target);
-
- gboolean gimp_matrix3_is_diagonal (GimpMatrix3 matrix);
- gboolean gimp_matrix3_is_identity (GimpMatrix3 matrix);
- gboolean gimp_matrix3_is_simple (GimpMatrix3 matrix);
-
-
- void gimp_matrix4_to_deg (GimpMatrix4 matrix,
- gdouble *a,
- gdouble *b,
- gdouble *c);
-
-
- #ifdef __cplusplus
- }
- #endif /* __cplusplus */
-
- #endif /* __GIMP_MATRIX_H__ */
-